Kitchen ventilator with recirculation function

ABSTRACT

A kitchen ventilator with recirculation function comprising a hood with a inhale plate installed obliquely on the bottom, a inhale hole is on the inhale plate; an exhaust motor is inside the hood, the exhaust motor connects to a duct; an air re-flow system is to have an air-returning channel on the back of the hood, the bottom of the air-returning channel forms at least one ventilator on the inhale plate; an air-returning motor is inside the air-returning channel to control the air flow direction. The present invention can avoid grease gathering on the wall, over-speeding of the exhaust motor to save energy and exhausting large quantity of warm indoor air.

BACKGROUND OF THE INVENTION

[0001] I. Field of the Invention

[0002] This invention relates generally to a kitchen ventilator with recirculation function and, more specifically, to a kitchen ventilator with recirculation function that has air-recirculation motor controlled by a circuitry to run both directions to enhance the ventilation effect or re-circulate clean warm air.

[0003] II. Description of the Prior Art

[0004] Heretofore, it is known that a kitchen ventilator is to have an external hood with a ventilation motor built-in, a grease filter is installed on the inhale hole. Such prior arts might have following issues:

[0005] The kitchen ventilators are installed against the wall; the smoke with grease is risen and inhaled by the suction, part of the grease is condensed on the wall to generate heavy stain and very difficult to clean up.

[0006] Most of the prior arts are designed to run at maximum speed without adjustment with the heavy level of smoke, such scheme introduce waste of energy.

[0007] The air temperature of frigid zone areas is cold, people apply heater to keep indoor warm; while the known kitchen ventilator is running, the warm air will be inhaled that lowers the indoor temperature rapidly.

SUMMARY OF THE INVENTION

[0008] It is therefore a primary object of the invention to provide a kitchen ventilator with recirculation function to solve following problems: prevent the accumulation of heavy grease stain on wall under the present invention; waste of energy to have the exhaust motor running at full speed al the time; inhale large amount of warm air indoor.

[0009] In order to achieve the objective set forth, a kitchen ventilator with recirculation function in accordance with the present invention comprises a hood with a inhale plate installed obliquely on the bottom, a inhale hole is on the inhale plate; an exhaust motor is inside the hood, the exhaust motor connects to a duct; an air re-flow system is to have an air-returning channel on the back of the hood, the top of the air-returning channel links to the exhaust duct, the bottom of the air-returning channel forms at least one ventilator on the inhale plate; an air-returning motor is inside the air-returning channel to control the air flow direction.

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accomplishment of the above-mentioned object of the present invention will become apparent from the following description and its accompanying drawings which disclose illustrative an embodiment of the present invention, and are as follows:

[0011]FIG. 1 is a cross-sectional view of the present invention;

[0012]FIG. 2A is a perspective view of the drip filter of the present invention;

[0013]FIG. 2B is a left cross-sectional view of the drip filter of the present invention;

[0014]FIG. 2C is another cross-sectional view of the drip filter of the present invention;

[0015]FIG. 2D is a back view of the drip filter of the present invention;

[0016]FIG. 3A is a cross-sectional view of the grease filter of the present invention;

[0017]FIG. 3B is a cross-sectional view of the filter layer of the present invention;

[0018]FIG. 3C is another cross-sectional view of the filter layer of the present invention;

[0019]FIG. 3D is another cross-sectional view of the grease filter of the present invention;

[0020]FIG. 4 is an air curtain function in accordance with the present invention.

[0021]FIG. 5 is an enhancement of inhalation of smoke in accordance with the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT

[0022] Referring to FIG. 1, the present invention is composed of a hood (11) with a inhale plate (13) installed obliquely on the bottom, a inhale hole (14) is on the inhale plate (13), several upper fixing slot (151) and lower fixing slot (152) are on top and bottom of the inhale plate (13), a grease pipe (153) connects to the lower fixing slot (152). An exhaust motor (12) is inside the hood (11), the exhaust motor (12) connects to a duct (122), the duct (122) faces the inhale hole (14), a exhaust duct (16) is on top of the exhaust motor (12), a motor grease pipe (121) is beneath the exhaust motor (12);

[0023] a grease filter (20), as shown in 2A to 3D, is behind the inhale hole (14), the grease filter (20) further consists of a rectangular curve frame (21) with an air conducting cover (22), several filter layer (23)(24) and a back net (25); the air conducting cover (22) is made of a thin metal plate with many inlet hole (221) bent inward; the filter layer (23)(24) are made of metal plate in wave shape, the wave directions of the filter layer (23)(24) are vertical to each other; the back net (25) is made of steel plate. Two fixed tenon (26) are on the bottom of the rectangular curve frame (21) to insert into the lower fixing slot (152), a handle (27) and two moveable tenon (271) are on top of the rectangular curve frame (21), the two moveable tenon (271) are inserted into the upper fixing slot (151); the upper fixing slot (151) is above the lower fixing slot (152), when the grease filter (20) is installed on the inhale hole (14), the grease filter (20) bends inward;

[0024] an air re-flow system is to have an air-returning channel (31) on the back of the hood (11), the top of the air-returning channel (31) links to the exhaust duct (16), the bottom of the air-returning channel (31) forms at least one ventilator (311) on the inhale plate (13); an air-returning motor (32) is inside the air-returning channel (31) to control the air flow direction; an air-returning grease filter (33) is installed obliquely on top of the air-returning motor (32) for grease to flow down, an air-returning grease pipe (34) is installed on the bottom of the air-returning grease filter (33);

[0025] a grease container (41) is on the back of the bottom of the hood (11), the grease container (41) gathers grease from the motor grease pipe (121), the grease pipe (153) and the air-returning grease pipe (34).

[0026] The function and the operation of the present invention are described below:

[0027] when users turn on exhaust motor (12), the smoke is inhaled from the inhale hole (14) and expelled out from the exhaust duct (16). The grease flows through the grease filter (20) and stays on the filter layer (23)(24); after a period of time and by gravity, the grease drips to the air conducting cover (22), the grease filter (20) is in a curve shape and bent inward, the grease flows from the inlet hole (221) to the bottom of the grease filter (20) and passes through the grease pipe (153) to the grease container (41), the grease will not drip from the grease filter (20) directly into cooking utensils. The filter layer (23)(24) offer larger plane to gather grease, the vertical wave structure of the filter layer (23)(24) gives better filter effect.

[0028] Referring to FIG. 4, the running direction of the air-returning motor (32) can be controlled by a circuitry; when the warm smoke contains grease in the exhaust duct (16), the air-returning motor (32) turns clockwise to exhaust hot air from the exhaust duct (16); the air passes through the air-returning grease filter (33) becomes clean without grease and expels from the ventilator (311), an air curtain is generated on the wall surface that is on the back of the main body (10) to block the grease from the wall for cleaner wall. Since the air is warm and can flow up, the smoke with grease is brought up for better ventilation cleaning efficiency. To the users in colder areas, the recycled warm air can achieve energy saving function.

[0029] Referring to FIG. 5, the air-returning motor (32) can run reversely and in synchronously with the exhaust motor (12) to have the smoke air inhale by the inhale hole (14) and the ventilator (311) at the same time, such scheme can speed up the expulsion of larger quantity of smoke air; when the smoke air is light, the air-returning motor (32) can switch to run clockwise for air-returning function.

[0030] While a preferred embodiment of the invention has been shown and described in detail, it will be readily understood and appreciated that numerous omissions, changes and additions may be made without departing from the spirit and scope of the invention. 

What is claimed is:
 1. A kitchen ventilator with recirculation function comprising: a hood with a inhale plate installed obliquely on the bottom, a inhale hole located on said inhale plate, an exhaust motor located inside said hood, an air re-flow system installed inside said hood, said air re-flow system further compromising: an air-returning channel located on the back of said hood, the top of said air-returning channel links to the exhaust duct, the bottom of said air-returning channel forms at least one ventilator, an air-returning motor located inside said air-returning channel.
 2. The kitchen ventilator with recirculation function recited in claim 1, wherein an air-returning grease filter being installed on top of said air-returning motor.
 3. The kitchen ventilator with recirculation function recited in claim 2, wherein said air-returning grease filter being installed obliquely.
 4. The kitchen ventilator with recirculation function recited in claim 3, wherein an air-returning grease pipe being installed on bottom of said air-returning grease filter.
 5. The kitchen ventilator with recirculation function recited in claim 1, wherein said air-returning motor being controlled by a circuitry to run clockwise or reversely.
 6. The kitchen ventilator with recirculation function recited in claim 5, wherein said air-returning motor exhausting hot air from said exhaust duct, the air being expelled from said ventilator to generated air curtain on the wall surface that is on the back of the main body.
 7. The kitchen ventilator with recirculation function recited in claim 5, wherein said air-returning motor running reversely to have the smoke air inhale by said ventilator.
 8. The kitchen ventilator with recirculation function recited in claim 1, wherein said inhale hole being installed obliquely.
 9. The kitchen ventilator with recirculation function recited in claim 8, wherein several upper fixing slots and lower fixing slots located on top and bottom of said inhale hole.
 10. The kitchen ventilator with recirculation function recited in claim 9, wherein a grease pipe connecting to said lower fixing slot.
 11. The kitchen ventilator with recirculation function recited in claim 9, wherein said grease filter is in rectangular curve shape with top and bottom fixed on said upper fixing slots and said lower fixing slots.
 12. The kitchen ventilator with recirculation function recited in claim 11, wherein two fixed tenons located are on the bottom of said grease filter to insert into said lower fixing slots, two moveable tenons located on top of said grease filter to insert into the said upper fixing slots.
 13. The kitchen ventilator with recirculation function recited in claim 9, wherein said grease filter being in a curve shape and bent inward.
 14. The kitchen ventilator with recirculation function recited in claim 13, wherein said grease filter consisting of an air conducting cover, several filter layers a back net.
 15. The kitchen ventilator with recirculation function recited in claim 13, wherein said air conducting cover having many inlet holes bent inward.
 16. The kitchen ventilator with recirculation function recited in claim 13, wherein said filter layers being made of metal plate in wave shape.
 17. The kitchen ventilator with recirculation function recited in claim 1, wherein said filter layers' wave directions are vertical to each other. 